﻿using NPOI.HPSF;
using NPOI.HSSF.UserModel;
using NPOI.SS.Formula.Eval;
using NPOI.SS.UserModel;
using NPOI.SS.Util;
using NPOI.XSSF.UserModel;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Text;

namespace TiaoTiaoCode.Common.Helpers
{
    /// <summary>
    /// NOPI 帮助类
    /// </summary>
    public class TiaoTiaoNPOI
    {
        #region 从datatable中将数据导出到excel

        /// <summary>
        /// DataTable导出到Excel文件
        /// </summary>
        /// <param name="dtSource">源DataTable</param>
        /// <param name="strHeaderText">表头文本</param>
        /// <param name="strFileName">保存位置</param>
        public static void ExportDTtoExcel(DataTable dtSource, string strHeaderText, string strFileName)
        {
            string[] temp = strFileName.Split('.');

            if (temp[temp.Length - 1] == "xls" && dtSource.Columns.Count < 256 && dtSource.Rows.Count < 65536)
            {
                using MemoryStream ms = ExportDT(dtSource, strHeaderText);
                using FileStream fs = new(strFileName, FileMode.Create, FileAccess.Write);
                byte[] data = ms.ToArray();
                fs.Write(data, 0, data.Length);
                fs.Flush();
            }
            else
            {
                if (temp[temp.Length - 1] == "xls")
                    strFileName += "x";

                using FileStream fs = new(strFileName, FileMode.Create, FileAccess.Write);
                ExportDTI(dtSource, fs);
            }
        }

        /// <summary>
        /// DataTable导出到Excel的MemoryStream
        /// </summary>
        /// <param name="dtSource">源DataTable</param>
        /// <param name="strHeaderText">表头文本</param>
        static MemoryStream ExportDT(DataTable dtSource, string strHeaderText)
        {
            HSSFWorkbook workbook = new();
            HSSFSheet sheet = (workbook.CreateSheet() as HSSFSheet)!;

            HSSFCellStyle dateStyle = (workbook.CreateCellStyle() as HSSFCellStyle)!;
            HSSFDataFormat format = (workbook.CreateDataFormat() as HSSFDataFormat)!;
            dateStyle.DataFormat = format.GetFormat("yyyy-mm-dd");

            //取得列宽
            int[] arrColWidth = new int[dtSource.Columns.Count];
            foreach (DataColumn item in dtSource.Columns)
            {
                arrColWidth[item.Ordinal] = Encoding.GetEncoding(936).GetBytes(item.ColumnName.ToString()).Length;
            }
            for (int i = 0; i < dtSource.Rows.Count; i++)
            {
                for (int j = 0; j < dtSource.Columns.Count; j++)
                {
                    int intTemp = Encoding.GetEncoding(936).GetBytes(dtSource.Rows[i][j].ToString()).Length;
                    if (intTemp > arrColWidth[j])
                    {
                        arrColWidth[j] = intTemp;
                    }
                }
            }
            int rowIndex = 0;

            foreach (DataRow row in dtSource.Rows)
            {
                #region 新建表，填充表头，填充列头，样式

                if (rowIndex == 65535 || rowIndex == 0)
                {
                    if (rowIndex != 0)
                    {
                        sheet = (workbook.CreateSheet() as HSSFSheet)!;
                    }

                    #region 表头及样式

                    if (!string.IsNullOrWhiteSpace(strHeaderText))
                    {
                        HSSFRow headerRow = (sheet.CreateRow(0) as HSSFRow)!;
                        headerRow.HeightInPoints = 25;
                        headerRow.CreateCell(0).SetCellValue(strHeaderText);

                        HSSFCellStyle headStyle = (workbook.CreateCellStyle() as HSSFCellStyle)!;
                        headStyle.Alignment = NPOI.SS.UserModel.HorizontalAlignment.Center;
                        HSSFFont font = (workbook.CreateFont() as HSSFFont)!;
                        font.FontHeightInPoints = 20;
                        font.IsBold = true;
                        headStyle.SetFont(font);

                        headerRow.GetCell(0).CellStyle = headStyle;

                        sheet.AddMergedRegion(new CellRangeAddress(0, 0, 0, dtSource.Columns.Count - 1));
                    }

                    #endregion

                    #region 列头及样式

                    {
                        var rowNum = 0;
                        rowIndex = 1;
                        if (!string.IsNullOrWhiteSpace(strHeaderText))
                        {
                            rowNum = 1;
                            rowIndex = 2;
                        }

                        HSSFRow headerRow = (sheet.CreateRow(rowNum) as HSSFRow)!;

                        HSSFCellStyle headStyle = (workbook.CreateCellStyle() as HSSFCellStyle)!;
                        headStyle.Alignment = NPOI.SS.UserModel.HorizontalAlignment.Center;
                        HSSFFont font = (workbook.CreateFont() as HSSFFont)!;
                        font.FontHeightInPoints = 10;
                        font.IsBold = true;
                        headStyle.SetFont(font);

                        foreach (DataColumn column in dtSource.Columns)
                        {
                            headerRow.CreateCell(column.Ordinal).SetCellValue(column.ColumnName);
                            headerRow.GetCell(column.Ordinal).CellStyle = headStyle;

                            //设置列宽
                            sheet.SetColumnWidth(column.Ordinal, (arrColWidth[column.Ordinal] + 1) * 256);

                        }
                    }

                    #endregion                    
                }

                #endregion

                #region 填充内容

                HSSFRow dataRow = (sheet.CreateRow(rowIndex) as HSSFRow)!;
                foreach (DataColumn column in dtSource.Columns)
                {
                    HSSFCell newCell = (dataRow.CreateCell(column.Ordinal) as HSSFCell)!;

                    string drValue = row[column].ToString();

                    switch (column.DataType.ToString())
                    {
                        case "System.String": //字符串类型
                            //double result;
                            //if (isNumeric(drValue, out result))
                            //{
                            //    double.TryParse(drValue, out result);
                            //    newCell.SetCellValue(result);
                            //}
                            //else
                            //    newCell.SetCellValue(drValue);

                            //字符串直出
                            newCell.SetCellValue(drValue);
                            break;
                        case "System.DateTime": //日期类型
                            DateTime dateV;
                            DateTime.TryParse(drValue, out dateV);

                            if (dateV.Year == 1)
                            { newCell.SetCellValue(""); }
                            else
                            { newCell.SetCellValue(dateV); }

                            newCell.CellStyle = dateStyle; //格式化显示
                            break;
                        case "System.Boolean": //布尔型
                            bool boolV = false;
                            bool.TryParse(drValue, out boolV);
                            newCell.SetCellValue(boolV);
                            break;
                        case "System.Int16": //整型
                        case "System.Int32":
                        case "System.Int64":
                        case "System.Byte":
                            int intV = 0;
                            int.TryParse(drValue, out intV);
                            newCell.SetCellValue(intV);
                            break;
                        case "System.Decimal": //浮点型
                        case "System.Double":
                            double doubV = 0;
                            double.TryParse(drValue, out doubV);
                            newCell.SetCellValue(doubV);
                            break;
                        case "System.DBNull": //空值处理
                            newCell.SetCellValue("");
                            break;
                        default:
                            newCell.SetCellValue("");
                            break;
                    }

                }

                #endregion

                rowIndex++;
            }
            using MemoryStream ms = new();
            workbook.Write(ms);
            ms.Flush();
            ms.Position = 0;

            return ms;
        }

        /// <summary>
        /// DataTable导出到Excel的MemoryStream
        /// </summary>
        /// <param name="dtSource">源DataTable</param>
        static void ExportDTI(DataTable dtSource, FileStream fs)
        {
            XSSFWorkbook workbook = new();
            XSSFSheet sheet = (workbook.CreateSheet() as XSSFSheet)!;

            XSSFCellStyle dateStyle = (workbook.CreateCellStyle() as XSSFCellStyle)!;
            XSSFDataFormat format = (workbook.CreateDataFormat() as XSSFDataFormat)!;
            dateStyle.DataFormat = format.GetFormat("yyyy-mm-dd");

            //取得列宽
            int[] arrColWidth = new int[dtSource.Columns.Count];
            foreach (DataColumn item in dtSource.Columns)
            {
                arrColWidth[item.Ordinal] = Encoding.GetEncoding(936).GetBytes(item.ColumnName.ToString()).Length;
            }
            for (int i = 0; i < dtSource.Rows.Count; i++)
            {
                for (int j = 0; j < dtSource.Columns.Count; j++)
                {
                    int intTemp = Encoding.GetEncoding(936).GetBytes(dtSource.Rows[i][j].ToString()).Length;
                    if (intTemp > arrColWidth[j])
                    {
                        arrColWidth[j] = intTemp;
                    }
                }
            }
            int rowIndex = 0;

            foreach (DataRow row in dtSource.Rows)
            {
                #region 新建表，填充表头，填充列头，样式

                if (rowIndex == 0)
                {
                    #region 列头及样式

                    {
                        XSSFRow headerRow = (sheet.CreateRow(0) as XSSFRow)!;

                        XSSFCellStyle headStyle = (workbook.CreateCellStyle() as XSSFCellStyle)!;
                        headStyle.Alignment = NPOI.SS.UserModel.HorizontalAlignment.Center;
                        XSSFFont font = (workbook.CreateFont() as XSSFFont)!;
                        font.FontHeightInPoints = 10;
                        font.IsBold = true;
                        headStyle.SetFont(font);

                        foreach (DataColumn column in dtSource.Columns)
                        {
                            headerRow.CreateCell(column.Ordinal).SetCellValue(column.ColumnName);
                            headerRow.GetCell(column.Ordinal).CellStyle = headStyle;

                            //设置列宽
                            sheet.SetColumnWidth(column.Ordinal, (arrColWidth[column.Ordinal] + 1) * 256);
                        }
                    }

                    #endregion

                    rowIndex = 1;
                }

                #endregion

                #region 填充内容

                XSSFRow dataRow = (sheet.CreateRow(rowIndex) as XSSFRow)!;
                foreach (DataColumn column in dtSource.Columns)
                {
                    XSSFCell newCell = (dataRow.CreateCell(column.Ordinal) as XSSFCell)!;

                    string drValue = row[column].ToString();

                    switch (column.DataType.ToString())
                    {
                        case "System.String": //字符串类型
                            //double result;
                            //if (isNumeric(drValue, out result))
                            //{
                            //    double.TryParse(drValue, out result);
                            //    newCell.SetCellValue(result);
                            //}
                            //else
                            //    newCell.SetCellValue(drValue);

                            //字符串直出
                            newCell.SetCellValue(drValue);
                            break;
                        case "System.DateTime": //日期类型
                            DateTime dateV;
                            DateTime.TryParse(drValue, out dateV);
                            newCell.SetCellValue(dateV);

                            newCell.CellStyle = dateStyle; //格式化显示
                            break;
                        case "System.Boolean": //布尔型
                            bool boolV = false;
                            bool.TryParse(drValue, out boolV);
                            newCell.SetCellValue(boolV);
                            break;
                        case "System.Int16": //整型
                        case "System.Int32":
                        case "System.Int64":
                        case "System.Byte":
                            int intV = 0;
                            int.TryParse(drValue, out intV);
                            newCell.SetCellValue(intV);
                            break;
                        case "System.Decimal": //浮点型
                        case "System.Double":
                            double doubV = 0;
                            double.TryParse(drValue, out doubV);
                            newCell.SetCellValue(doubV);
                            break;
                        case "System.DBNull": //空值处理
                            newCell.SetCellValue("");
                            break;
                        default:
                            newCell.SetCellValue("");
                            break;
                    }

                }

                #endregion

                rowIndex++;
            }
            workbook.Write(fs);
            fs.Close();
        }

        #endregion

        #region 从excel中将数据导出到datatable

        /// <summary>
        /// 读取excel 默认第一行为标头
        /// </summary>
        /// <param name="strFileName">excel文档路径</param>
        /// <returns></returns>
        public static DataTable ImportExceltoDt(string strFileName)
        {
            IWorkbook wb;

            using (FileStream file = new(strFileName, FileMode.Open, FileAccess.Read))
            {
                wb = WorkbookFactory.Create(file);
            }
            ISheet sheet = wb.GetSheetAt(0);
            var dt = ImportDt(sheet, 0, true);
            return dt;
        }

        /// <summary>
        /// 读取Excel流到DataTable
        /// </summary>
        /// <param name="stream">Excel流</param>
        /// <returns>第一个sheet中的数据</returns>
        public static DataTable ImportExceltoDt(Stream stream)
        {
            try
            {
                DataTable dt = new();
                IWorkbook wb;
                using (stream)
                {
                    wb = WorkbookFactory.Create(stream);
                }
                ISheet sheet = wb.GetSheetAt(0);
                dt = ImportDt(sheet, 0, true);
                return dt;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// 读取Excel流到DataTable
        /// </summary>
        /// <param name="stream">Excel流</param>
        /// <param name="sheetName">表单名</param>
        /// <param name="HeaderRowIndex">列头所在行号，-1表示没有列头</param>
        /// <returns>指定sheet中的数据</returns>
        public static DataTable ImportExceltoDt(Stream stream, string sheetName, int HeaderRowIndex)
        {
            try
            {
                IWorkbook wb;
                using (stream)
                {
                    wb = WorkbookFactory.Create(stream);
                }
                ISheet sheet = wb.GetSheet(sheetName);
                var dt = ImportDt(sheet, HeaderRowIndex, true);
                return dt;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// 读取Excel流到DataSet
        /// </summary>
        /// <param name="stream">Excel流</param>
        /// <returns>Excel中的数据</returns>
        public static DataSet ImportExceltoDs(Stream stream)
        {
            try
            {
                DataSet ds = new();
                IWorkbook wb;
                using (stream)
                {
                    wb = WorkbookFactory.Create(stream);
                }
                for (int i = 0; i < wb.NumberOfSheets; i++)
                {
                    DataTable dt = new();
                    ISheet sheet = wb.GetSheetAt(i);
                    dt = ImportDt(sheet, 0, true);
                    ds.Tables.Add(dt);
                }
                return ds;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// 读取Excel流到DataSet
        /// </summary>
        /// <param name="stream">Excel流</param>
        /// <param name="dict">字典参数，key：sheet名，value：列头所在行号，-1表示没有列头</param>
        /// <returns>Excel中的数据</returns>
        public static DataSet ImportExceltoDs(Stream stream, Dictionary<string, int> dict)
        {
            try
            {
                DataSet ds = new();
                IWorkbook wb;
                using (stream)
                {
                    wb = WorkbookFactory.Create(stream);
                }
                foreach (string key in dict.Keys)
                {
                    DataTable dt = new();
                    ISheet sheet = wb.GetSheet(key);
                    dt = ImportDt(sheet, dict[key], true);
                    ds.Tables.Add(dt);
                }
                return ds;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// 读取excel
        /// </summary>
        /// <param name="strFileName">excel文件路径</param>
        /// <param name="sheet">需要导出的sheet</param>
        /// <param name="HeaderRowIndex">列头所在行号，-1表示没有列头</param>
        /// <returns></returns>
        public static DataTable ImportExceltoDt(string strFileName, string SheetName, int HeaderRowIndex)
        {
            //HSSFWorkbook workbook;
            IWorkbook wb;
            using (FileStream file = new(strFileName, FileMode.Open, FileAccess.Read))
            {
                wb = new HSSFWorkbook(file);
            }
            ISheet sheet = wb.GetSheet(SheetName);
            DataTable table = ImportDt(sheet, HeaderRowIndex, true);
            //ExcelFileStream.Close();
            //workbook = null;
            //sheet = null;
            return table;
        }

        /// <summary>
        /// 读取excel
        /// </summary>
        /// <param name="strFileName">excel文件路径</param>
        /// <param name="sheet">需要导出的sheet序号</param>
        /// <param name="HeaderRowIndex">列头所在行号，-1表示没有列头</param>
        /// <returns></returns>
        public static DataTable ImportExceltoDt(string strFileName, int SheetIndex, int HeaderRowIndex)
        {
            //HSSFWorkbook workbook;
            IWorkbook wb;
            using (FileStream file = new(strFileName, FileMode.Open, FileAccess.Read))
            {
                wb = WorkbookFactory.Create(file);
            }
            ISheet isheet = wb.GetSheetAt(SheetIndex);
            DataTable table = ImportDt(isheet, HeaderRowIndex, true);
            //ExcelFileStream.Close();
            //workbook = null;
            //isheet = null;
            return table;
        }

        /// <summary>
        /// 读取excel
        /// </summary>
        /// <param name="strFileName">excel文件路径</param>
        /// <param name="sheet">需要导出的sheet序号</param>
        /// <param name="HeaderRowIndex">列头所在行号，-1表示没有列头</param>
        /// <returns></returns>
        public static DataTable ImportExceltoDt(string strFileName, int SheetIndex, string EndColIndex)
        {
            if (EndColIndex == "") EndColIndex = "0";

            //HSSFWorkbook workbook;
            IWorkbook wb;
            using (FileStream file = new(strFileName, FileMode.Open, FileAccess.Read))
            {
                wb = WorkbookFactory.Create(file);
            }
            ISheet isheet = wb.GetSheetAt(SheetIndex);
            DataTable table = ImportDt(isheet, int.Parse(EndColIndex));
            //ExcelFileStream.Close();
            //workbook = null;
            //isheet = null;
            return table;
        }


        /// <summary>
        /// 读取excel
        /// </summary>
        /// <param name="strFileName">excel文件路径</param>
        /// <param name="sheet">需要导出的sheet</param>
        /// <param name="HeaderRowIndex">列头所在行号，-1表示没有列头</param>
        /// <returns></returns>
        public static DataTable ImportExceltoDt(string strFileName, string SheetName, int HeaderRowIndex, bool needHeader)
        {
            //HSSFWorkbook workbook;
            IWorkbook wb;
            using (FileStream file = new(strFileName, FileMode.Open, FileAccess.Read))
            {
                wb = WorkbookFactory.Create(file);
            }
            ISheet sheet = wb.GetSheet(SheetName);
            DataTable table = ImportDt(sheet, HeaderRowIndex, needHeader);
            //ExcelFileStream.Close();
            //workbook = null;
            //sheet = null;
            return table;
        }

        /// <summary>
        /// 读取excel
        /// </summary>
        /// <param name="strFileName">excel文件路径</param>
        /// <param name="sheet">需要导出的sheet序号</param>
        /// <param name="HeaderRowIndex">列头所在行号，-1表示没有列头</param>
        /// <returns></returns>
        public static DataTable ImportExceltoDt(string strFileName, int SheetIndex, int HeaderRowIndex, bool needHeader)
        {
            //HSSFWorkbook workbook;
            IWorkbook wb;
            using (FileStream file = new(strFileName, FileMode.Open, FileAccess.Read))
            {
                wb = WorkbookFactory.Create(file);
            }
            ISheet sheet = wb.GetSheetAt(SheetIndex);
            DataTable table = ImportDt(sheet, HeaderRowIndex, needHeader);
            //ExcelFileStream.Close();
            //workbook = null;
            //sheet = null;            
            return table;
        }

        /// <summary>
        /// 将指定列区间 sheet中的数据导入到datatable中
        /// </summary>
        /// <param name="sheet">需要导入的sheet</param>
        /// <param name="HeaderRowIndex">列头所在行号，-1表示没有列头</param>
        /// <returns></returns>
        static DataTable ImportDt(ISheet sheet, int EndColIndex)
        {
            DataTable table = new();
            //IRow headerRow;
            //int cellCount;
            try
            {
                for (int i = 0; i <= EndColIndex; i++)
                {
                    DataColumn column = new(Convert.ToString(i));
                    table.Columns.Add(column);
                }

                int rowCount = sheet.LastRowNum;
                for (int i = 0; i <= sheet.LastRowNum; i++)
                {
                    try
                    {
                        IRow row;
                        if (sheet.GetRow(i) == null)
                        {
                            row = sheet.CreateRow(i);
                        }
                        else
                        {
                            row = sheet.GetRow(i);
                        }

                        DataRow dataRow = table.NewRow();

                        for (int j = 0; j <= EndColIndex; j++)
                        {
                            try
                            {
                                if (row.GetCell(j) != null)
                                {
                                    switch (row.GetCell(j).CellType)
                                    {
                                        case CellType.String:
                                            string str = row.GetCell(j).StringCellValue;
                                            if (str != null && str.Length > 0)
                                            {
                                                dataRow[j] = str.ToString();
                                            }
                                            else
                                            {
                                                dataRow[j] = null;
                                            }
                                            break;
                                        case CellType.Numeric:
                                            if (DateUtil.IsCellDateFormatted(row.GetCell(j)))
                                            {
                                                dataRow[j] = DateTime.FromOADate(row.GetCell(j).NumericCellValue);
                                            }
                                            else
                                            {
                                                dataRow[j] = Convert.ToDouble(row.GetCell(j).NumericCellValue);
                                            }
                                            break;
                                        case CellType.Boolean:
                                            dataRow[j] = Convert.ToString(row.GetCell(j).BooleanCellValue);
                                            break;
                                        case CellType.Error:
                                            dataRow[j] = ErrorEval.GetText(row.GetCell(j).ErrorCellValue);
                                            break;
                                        case CellType.Formula:
                                            switch (row.GetCell(j).CachedFormulaResultType)
                                            {
                                                case CellType.String:
                                                    string strFORMULA = row.GetCell(j).StringCellValue;
                                                    if (strFORMULA != null && strFORMULA.Length > 0)
                                                    {
                                                        dataRow[j] = strFORMULA.ToString();
                                                    }
                                                    else
                                                    {
                                                        dataRow[j] = null;
                                                    }
                                                    break;
                                                case CellType.Numeric:
                                                    dataRow[j] = Convert.ToString(row.GetCell(j).NumericCellValue);
                                                    break;
                                                case CellType.Boolean:
                                                    dataRow[j] = Convert.ToString(row.GetCell(j).BooleanCellValue);
                                                    break;
                                                case CellType.Error:
                                                    dataRow[j] = ErrorEval.GetText(row.GetCell(j).ErrorCellValue);
                                                    break;
                                                default:
                                                    dataRow[j] = "";
                                                    break;
                                            }
                                            break;
                                        default:
                                            dataRow[j] = "";
                                            break;
                                    }
                                }
                            }
                            catch
                            {

                            }
                        }
                        table.Rows.Add(dataRow);
                    }
                    catch
                    {

                    }
                }
            }
            catch
            {

            }
            return table;
        }

        /// <summary>
        /// 将制定sheet中的数据导出到datatable中
        /// </summary>
        /// <param name="sheet">需要导出的sheet</param>
        /// <param name="HeaderRowIndex">列头所在行号，-1表示没有列头</param>
        /// <returns></returns>
        static DataTable ImportDt(ISheet sheet, int HeaderRowIndex, bool needHeader)
        {
            DataTable table = new();
            IRow headerRow;
            int cellCount;
            try
            {
                if (HeaderRowIndex < 0 || !needHeader)
                {
                    headerRow = sheet.GetRow(0);
                    cellCount = headerRow.LastCellNum;

                    for (int i = headerRow.FirstCellNum; i <= cellCount; i++)
                    {
                        DataColumn column = new(Convert.ToString(i));
                        table.Columns.Add(column);
                    }
                }
                else
                {
                    headerRow = sheet.GetRow(HeaderRowIndex);
                    cellCount = headerRow.LastCellNum;

                    for (int i = headerRow.FirstCellNum; i <= cellCount; i++)
                    {
                        if (headerRow.GetCell(i) == null)
                        {
                            if (table.Columns.IndexOf(Convert.ToString(i)) > 0)
                            {
                                DataColumn column = new(Convert.ToString("重复列名" + i));
                                table.Columns.Add(column);
                            }
                            else
                            {
                                DataColumn column = new(Convert.ToString(i));
                                table.Columns.Add(column);
                            }

                        }
                        else if (table.Columns.IndexOf(headerRow.GetCell(i).ToString()) > 0)
                        {
                            DataColumn column = new(Convert.ToString("重复列名" + i));
                            table.Columns.Add(column);
                        }
                        else
                        {
                            DataColumn column = new(headerRow.GetCell(i).ToString());
                            table.Columns.Add(column);
                        }
                    }
                }
                int rowCount = sheet.LastRowNum;
                for (int i = (HeaderRowIndex + 1); i <= sheet.LastRowNum; i++)
                {
                    try
                    {
                        IRow row;
                        if (sheet.GetRow(i) == null)
                        {
                            row = sheet.CreateRow(i);
                        }
                        else
                        {
                            row = sheet.GetRow(i);
                        }

                        DataRow dataRow = table.NewRow();

                        for (int j = row.FirstCellNum; j <= cellCount; j++)
                        {
                            try
                            {
                                if (row.GetCell(j) != null)
                                {
                                    switch (row.GetCell(j).CellType)
                                    {
                                        case CellType.String:
                                            string str = row.GetCell(j).StringCellValue;
                                            if (str != null && str.Length > 0)
                                            {
                                                dataRow[j] = str.ToString();
                                            }
                                            else
                                            {
                                                dataRow[j] = null;
                                            }
                                            break;
                                        case CellType.Numeric:
                                            if (DateUtil.IsCellDateFormatted(row.GetCell(j)))
                                            {
                                                dataRow[j] = DateTime.FromOADate(row.GetCell(j).NumericCellValue);
                                            }
                                            else
                                            {
                                                dataRow[j] = Convert.ToDouble(row.GetCell(j).NumericCellValue);
                                            }
                                            break;
                                        case CellType.Boolean:
                                            dataRow[j] = Convert.ToString(row.GetCell(j).BooleanCellValue);
                                            break;
                                        case CellType.Error:
                                            dataRow[j] = ErrorEval.GetText(row.GetCell(j).ErrorCellValue);
                                            break;
                                        case CellType.Formula:
                                            switch (row.GetCell(j).CachedFormulaResultType)
                                            {
                                                case CellType.String:
                                                    string strFORMULA = row.GetCell(j).StringCellValue;
                                                    if (strFORMULA != null && strFORMULA.Length > 0)
                                                    {
                                                        dataRow[j] = strFORMULA.ToString();
                                                    }
                                                    else
                                                    {
                                                        dataRow[j] = null;
                                                    }
                                                    break;
                                                case CellType.Numeric:
                                                    dataRow[j] = Convert.ToString(row.GetCell(j).NumericCellValue);
                                                    break;
                                                case CellType.Boolean:
                                                    dataRow[j] = Convert.ToString(row.GetCell(j).BooleanCellValue);
                                                    break;
                                                case CellType.Error:
                                                    dataRow[j] = ErrorEval.GetText(row.GetCell(j).ErrorCellValue);
                                                    break;
                                                default:
                                                    dataRow[j] = "";
                                                    break;
                                            }
                                            break;
                                        default:
                                            dataRow[j] = "";
                                            break;
                                    }
                                }
                            }
                            catch
                            {

                            }
                        }
                        table.Rows.Add(dataRow);
                    }
                    catch
                    {

                    }
                }
            }
            catch
            {

            }
            return table;
        }

        #endregion

        public static void InsertSheet(string outputFile, string sheetname, DataTable dt)
        {
            FileStream readfile = new(outputFile, FileMode.Open, FileAccess.Read);
            IWorkbook hssfworkbook = WorkbookFactory.Create(readfile);
            //HSSFWorkbook hssfworkbook = new HSSFWorkbook(readfile);
            int num = hssfworkbook.GetSheetIndex(sheetname);
            ISheet sheet1;
            if (num >= 0)
                sheet1 = hssfworkbook.GetSheet(sheetname);
            else
            {
                sheet1 = hssfworkbook.CreateSheet(sheetname);
            }

            try
            {
                if (sheet1.GetRow(0) == null)
                {
                    sheet1.CreateRow(0);
                }
                for (int coluid = 0; coluid < dt.Columns.Count; coluid++)
                {
                    if (sheet1.GetRow(0).GetCell(coluid) == null)
                    {
                        sheet1.GetRow(0).CreateCell(coluid);
                    }

                    sheet1.GetRow(0).GetCell(coluid).SetCellValue(dt.Columns[coluid].ColumnName);
                }
            }
            catch
            {

                throw;
            }

            for (int i = 1; i <= dt.Rows.Count; i++)
            {
                try
                {
                    if (sheet1.GetRow(i) == null)
                    {
                        sheet1.CreateRow(i);
                    }
                    for (int coluid = 0; coluid < dt.Columns.Count; coluid++)
                    {
                        if (sheet1.GetRow(i).GetCell(coluid) == null)
                        {
                            sheet1.GetRow(i).CreateCell(coluid);
                        }

                        sheet1.GetRow(i).GetCell(coluid).SetCellValue(dt.Rows[i - 1][coluid].ToString());
                    }
                }
                catch
                {

                }
            }
            try
            {
                readfile.Close();

                FileStream writefile = new(outputFile, FileMode.OpenOrCreate, FileAccess.Write);
                hssfworkbook.Write(writefile, true);
                writefile.Close();
            }
            catch
            {

            }
        }

        #region 更新excel中的数据

        /// <summary>
        /// 更新Excel表格
        /// </summary>
        /// <param name="outputFile">需更新的excel表格路径</param>
        /// <param name="sheetname">sheet名</param>
        /// <param name="updateData">需更新的数据</param>
        /// <param name="coluid">需更新的列号</param>
        /// <param name="rowid">需更新的开始行号</param>
        public static void UpdateExcel(string outputFile, string sheetname, string[] updateData, int coluid, int rowid)
        {
            //FileStream readfile = new FileStream(outputFile, FileMode.Open, FileAccess.Read);
            IWorkbook hssfworkbook = WorkbookFactory.Create(outputFile);
            //HSSFWorkbook hssfworkbook = new HSSFWorkbook(readfile);
            ISheet sheet1 = hssfworkbook.GetSheet(sheetname);
            for (int i = 0; i < updateData.Length; i++)
            {
                try
                {
                    if (sheet1.GetRow(i + rowid) == null)
                    {
                        sheet1.CreateRow(i + rowid);
                    }
                    if (sheet1.GetRow(i + rowid).GetCell(coluid) == null)
                    {
                        sheet1.GetRow(i + rowid).CreateCell(coluid);
                    }

                    sheet1.GetRow(i + rowid).GetCell(coluid).SetCellValue(updateData[i]);
                }
                catch
                {

                    throw;
                }
            }
            try
            {
                //readfile.Close();
                FileStream writefile = new(outputFile, FileMode.OpenOrCreate, FileAccess.Write);
                hssfworkbook.Write(writefile, true);
                writefile.Close();
            }
            catch
            {

            }
        }

        /// <summary>
        /// 更新Excel表格
        /// </summary>
        /// <param name="outputFile">需更新的excel表格路径</param>
        /// <param name="sheetname">sheet名</param>
        /// <param name="updateData">需更新的数据</param>
        /// <param name="coluids">需更新的列号</param>
        /// <param name="rowid">需更新的开始行号</param>
        public static void UpdateExcel(string outputFile, string sheetname, string[][] updateData, int[] coluids, int rowid)
        {
            FileStream readfile = new(outputFile, FileMode.Open, FileAccess.Read);

            HSSFWorkbook hssfworkbook = new(readfile);
            readfile.Close();
            ISheet sheet1 = hssfworkbook.GetSheet(sheetname);
            for (int j = 0; j < coluids.Length; j++)
            {
                for (int i = 0; i < updateData[j].Length; i++)
                {
                    try
                    {
                        if (sheet1.GetRow(i + rowid) == null)
                        {
                            sheet1.CreateRow(i + rowid);
                        }
                        if (sheet1.GetRow(i + rowid).GetCell(coluids[j]) == null)
                        {
                            sheet1.GetRow(i + rowid).CreateCell(coluids[j]);
                        }
                        sheet1.GetRow(i + rowid).GetCell(coluids[j]).SetCellValue(updateData[j][i]);
                    }
                    catch
                    {

                    }
                }
            }
            try
            {
                FileStream writefile = new(outputFile, FileMode.Create);
                hssfworkbook.Write(writefile);
                writefile.Close();
            }
            catch
            {

            }
        }

        /// <summary>
        /// 更新Excel表格
        /// </summary>
        /// <param name="outputFile">需更新的excel表格路径</param>
        /// <param name="sheetname">sheet名</param>
        /// <param name="updateData">需更新的数据</param>
        /// <param name="coluid">需更新的列号</param>
        /// <param name="rowid">需更新的开始行号</param>
        public static void UpdateExcel(string outputFile, string sheetname, double[] updateData, int coluid, int rowid)
        {
            FileStream readfile = new(outputFile, FileMode.Open, FileAccess.Read);

            HSSFWorkbook hssfworkbook = new(readfile);
            ISheet sheet1 = hssfworkbook.GetSheet(sheetname);
            for (int i = 0; i < updateData.Length; i++)
            {
                try
                {
                    if (sheet1.GetRow(i + rowid) == null)
                    {
                        sheet1.CreateRow(i + rowid);
                    }
                    if (sheet1.GetRow(i + rowid).GetCell(coluid) == null)
                    {
                        sheet1.GetRow(i + rowid).CreateCell(coluid);
                    }

                    sheet1.GetRow(i + rowid).GetCell(coluid).SetCellValue(updateData[i]);
                }
                catch
                {

                    throw;
                }
            }
            try
            {
                readfile.Close();
                FileStream writefile = new(outputFile, FileMode.Create, FileAccess.Write);
                hssfworkbook.Write(writefile);
                writefile.Close();
            }
            catch
            {

            }
        }

        /// <summary>
        /// 更新Excel表格
        /// </summary>
        /// <param name="outputFile">需更新的excel表格路径</param>
        /// <param name="sheetname">sheet名</param>
        /// <param name="updateData">需更新的数据</param>
        /// <param name="coluids">需更新的列号</param>
        /// <param name="rowid">需更新的开始行号</param>
        public static void UpdateExcel(string outputFile, string sheetname, double[][] updateData, int[] coluids, int rowid)
        {
            FileStream readfile = new(outputFile, FileMode.Open, FileAccess.Read);

            HSSFWorkbook hssfworkbook = new(readfile);
            readfile.Close();
            ISheet sheet1 = hssfworkbook.GetSheet(sheetname);
            for (int j = 0; j < coluids.Length; j++)
            {
                for (int i = 0; i < updateData[j].Length; i++)
                {
                    try
                    {
                        if (sheet1.GetRow(i + rowid) == null)
                        {
                            sheet1.CreateRow(i + rowid);
                        }
                        if (sheet1.GetRow(i + rowid).GetCell(coluids[j]) == null)
                        {
                            sheet1.GetRow(i + rowid).CreateCell(coluids[j]);
                        }
                        sheet1.GetRow(i + rowid).GetCell(coluids[j]).SetCellValue(updateData[j][i]);
                    }
                    catch
                    {

                    }
                }
            }
            try
            {
                FileStream writefile = new(outputFile, FileMode.Create);
                hssfworkbook.Write(writefile);
                writefile.Close();
            }
            catch
            {

            }
        }

        #endregion

        public static int GetSheetNumber(string outputFile)
        {
            int number = 0;
            try
            {
                FileStream readfile = new(outputFile, FileMode.Open, FileAccess.Read);

                HSSFWorkbook hssfworkbook = new(readfile);
                number = hssfworkbook.NumberOfSheets;

            }
            catch
            {

            }
            return number;
        }

        public static ArrayList GetSheetName(string outputFile)
        {
            ArrayList arrayList = new();
            try
            {
                FileStream readfile = new(outputFile, FileMode.Open, FileAccess.Read);

                HSSFWorkbook hssfworkbook = new(readfile);
                for (int i = 0; i < hssfworkbook.NumberOfSheets; i++)
                {
                    arrayList.Add(hssfworkbook.GetSheetName(i));
                }
            }
            catch
            {

            }
            return arrayList;
        }

        /// <summary>
        /// DataTable导出到Excel的MemoryStream                                                                      第二步
        /// </summary>
        /// <param name="dtSource">源DataTable</param>
        /// <param name="strHeaderText">表头文本</param>
        public static MemoryStream Export(DataTable dtSource, string strHeaderText)
        {
            HSSFWorkbook workbook = new();
            HSSFSheet sheet = (workbook.CreateSheet() as HSSFSheet)!;

            #region 右击文件 属性信息
            {
                DocumentSummaryInformation dsi = PropertySetFactory.CreateDocumentSummaryInformation();
                dsi.Company = "NPOI";
                workbook.DocumentSummaryInformation = dsi;

                SummaryInformation si = PropertySetFactory.CreateSummaryInformation();
                si.Author = "文件作者信息"; //填加xls文件作者信息
                si.ApplicationName = "创建程序信息"; //填加xls文件创建程序信息
                si.LastAuthor = "最后保存者信息"; //填加xls文件最后保存者信息
                si.Comments = "作者信息"; //填加xls文件作者信息
                si.Title = "标题信息"; //填加xls文件标题信息
                si.Subject = "主题信息";//填加文件主题信息

                si.CreateDateTime = DateTime.Now;
                workbook.SummaryInformation = si;
            }
            #endregion

            HSSFCellStyle dateStyle = (workbook.CreateCellStyle() as HSSFCellStyle)!;
            HSSFDataFormat format = (workbook.CreateDataFormat() as HSSFDataFormat)!;
            dateStyle.DataFormat = format.GetFormat("yyyy-mm-dd");

            //取得列宽
            int[] arrColWidth = new int[dtSource.Columns.Count];
            foreach (DataColumn item in dtSource.Columns)
            {
                arrColWidth[item.Ordinal] = Encoding.GetEncoding(936).GetBytes(item.ColumnName.ToString()).Length;
            }
            for (int i = 0; i < dtSource.Rows.Count; i++)
            {
                for (int j = 0; j < dtSource.Columns.Count; j++)
                {
                    int intTemp = Encoding.GetEncoding(936).GetBytes(dtSource.Rows[i][j].ToString()).Length;
                    if (intTemp > arrColWidth[j])
                    {
                        arrColWidth[j] = intTemp;
                    }
                }
            }
            int rowIndex = 0;

            foreach (DataRow row in dtSource.Rows)
            {
                #region 新建表，填充表头，填充列头，样式

                if (rowIndex == 65535 || rowIndex == 0)
                {
                    if (rowIndex != 0)
                    {
                        sheet = (workbook.CreateSheet() as HSSFSheet)!;
                    }

                    #region 表头及样式
                    {
                        if (string.IsNullOrEmpty(strHeaderText))
                        {
                            HSSFRow headerRow = (sheet.CreateRow(0) as HSSFRow)!;
                            headerRow.HeightInPoints = 25;
                            headerRow.CreateCell(0).SetCellValue(strHeaderText);
                            HSSFCellStyle headStyle = (workbook.CreateCellStyle() as HSSFCellStyle)!;
                            //headStyle.Alignment = CellHorizontalAlignment.CENTER;
                            HSSFFont font = (workbook.CreateFont() as HSSFFont)!;
                            font.FontHeightInPoints = 20;
                            font.IsBold = true;
                            headStyle.SetFont(font);
                            headerRow.GetCell(0).CellStyle = headStyle;
                            sheet.AddMergedRegion(new CellRangeAddress(0, 0, 0, dtSource.Columns.Count - 1));
                            //headerRow.Dispose();
                        }
                    }
                    #endregion

                    #region 列头及样式
                    {
                        HSSFRow headerRow = (sheet.CreateRow(0) as HSSFRow)!;
                        HSSFCellStyle headStyle = (workbook.CreateCellStyle() as HSSFCellStyle)!;
                        //headStyle.Alignment = CellHorizontalAlignment.CENTER;
                        HSSFFont font = (workbook.CreateFont() as HSSFFont)!;
                        font.FontHeightInPoints = 10;
                        font.IsBold = true;
                        headStyle.SetFont(font);
                        foreach (DataColumn column in dtSource.Columns)
                        {
                            headerRow.CreateCell(column.Ordinal).SetCellValue(column.ColumnName);
                            headerRow.GetCell(column.Ordinal).CellStyle = headStyle;

                            //设置列宽
                            sheet.SetColumnWidth(column.Ordinal, (arrColWidth[column.Ordinal] + 1) * 256);
                        }
                        //headerRow.Dispose();
                    }
                    #endregion

                    rowIndex = 1;
                }

                #endregion

                #region 填充内容

                HSSFRow dataRow = (sheet.CreateRow(rowIndex) as HSSFRow)!;
                foreach (DataColumn column in dtSource.Columns)
                {
                    HSSFCell newCell = (dataRow.CreateCell(column.Ordinal) as HSSFCell)!;

                    string drValue = row[column].ToString();

                    switch (column.DataType.ToString())
                    {
                        case "System.String"://字符串类型
                            newCell.SetCellValue(drValue);
                            break;
                        case "System.DateTime"://日期类型
                            DateTime dateV;
                            DateTime.TryParse(drValue, out dateV);
                            newCell.SetCellValue(dateV);

                            newCell.CellStyle = dateStyle;//格式化显示
                            break;
                        case "System.Boolean"://布尔型
                            bool boolV = false;
                            bool.TryParse(drValue, out boolV);
                            newCell.SetCellValue(boolV);
                            break;
                        case "System.Int16"://整型
                        case "System.Int32":
                        case "System.Int64":
                        case "System.Byte":
                            int intV = 0;
                            int.TryParse(drValue, out intV);
                            newCell.SetCellValue(intV);
                            break;
                        case "System.Decimal"://浮点型
                        case "System.Double":
                            double doubV = 0;
                            double.TryParse(drValue, out doubV);
                            newCell.SetCellValue(doubV);
                            break;
                        case "System.DBNull"://空值处理
                            newCell.SetCellValue("");
                            break;
                        default:
                            newCell.SetCellValue("");
                            break;
                    }
                }
                #endregion

                rowIndex++;
            }
            using MemoryStream ms = new();
            workbook.Write(ms);
            ms.Flush();
            ms.Position = 0;

            //sheet.Dispose();
            //workbook.Dispose();//一般只用写这一个就OK了，他会遍历并释放所有资源，但当前版本有问题所以只释放sheet
            return ms;
        }
        
        /// <summary>
        /// 验证导入的Excel是否有数据
        /// </summary>
        /// <param name="excelFileStream"></param>
        /// <returns></returns>
        public static bool HasData(Stream excelFileStream)
        {
            using (excelFileStream)
            {
                IWorkbook workBook = new HSSFWorkbook(excelFileStream);
                if (workBook.NumberOfSheets > 0)
                {
                    ISheet sheet = workBook.GetSheetAt(0);
                    return sheet.PhysicalNumberOfRows > 0;
                }
            }
            return false;
        }

        /// <summary>
        /// 数据库对单元格按数据类型输出
        /// </summary>
        /// <param name="mySheet"></param>
        /// <param name="RowIndex"></param>
        /// <param name="CowIndex"></param>
        /// <param name="mydt"></param>
        /// <param name="vrow"></param>
        /// <param name="vcol"></param>
        public static void OutDBtoEXCELcell(ISheet mySheet, int RowIndex, int CowIndex, DataTable mydt, int vrow, string vcol)
        {
            string drValue = mydt.Rows[vrow][vcol].ToString();

            switch (mydt.Columns[vcol].DataType.ToString())
            {
                case "System.String"://字符串类型   
                    mySheet.GetRow(RowIndex).GetCell(CowIndex).SetCellValue(drValue);
                    break;
                case "System.DateTime"://日期类型   
                    DateTime dateV;
                    DateTime.TryParse(drValue, out dateV);
                    mySheet.GetRow(RowIndex).GetCell(CowIndex).SetCellValue(dateV);

                    break;
                case "System.Boolean"://布尔型                       
                    bool.TryParse(drValue, out bool boolV);
                    mySheet.GetRow(RowIndex).GetCell(CowIndex).SetCellValue(boolV);
                    break;
                case "System.Int16"://整型   
                case "System.Int32":
                case "System.Int64":
                case "System.Byte":
                    int.TryParse(drValue, out int intV);
                    mySheet.GetRow(RowIndex).GetCell(CowIndex).SetCellValue(intV);
                    break;
                case "System.Decimal"://浮点型   
                case "System.Double":
                    double.TryParse(drValue, out double doubV);
                    mySheet.GetRow(RowIndex).GetCell(CowIndex).SetCellValue(doubV);
                    break;
                case "System.DBNull"://空值处理   
                    mySheet.GetRow(RowIndex).GetCell(CowIndex).SetCellValue("");
                    break;
                default:
                    mySheet.GetRow(RowIndex).GetCell(CowIndex).SetCellValue("");
                    break;
            }

        }

        public static void OutDBtoEXCELcell(HSSFSheet mySheet, int RowIndex, int CowIndex, DataTable mydt, int vrow, int vcol)
        {
            string drValue = mydt.Rows[vrow][vcol].ToString();

            switch (mydt.Columns[vcol].DataType.ToString())
            {
                case "System.String"://字符串类型   
                    mySheet.GetRow(RowIndex).GetCell(CowIndex).SetCellValue(drValue);
                    break;
                case "System.DateTime"://日期类型   
                    DateTime dateV;
                    DateTime.TryParse(drValue, out dateV);
                    mySheet.GetRow(RowIndex).GetCell(CowIndex).SetCellValue(dateV);

                    break;
                case "System.Boolean"://布尔型                       
                    bool.TryParse(drValue, out bool boolV);
                    mySheet.GetRow(RowIndex).GetCell(CowIndex).SetCellValue(boolV);
                    break;
                case "System.Int16"://整型   
                case "System.Int32":
                case "System.Int64":
                case "System.Byte":
                    int.TryParse(drValue, out int intV);
                    mySheet.GetRow(RowIndex).GetCell(CowIndex).SetCellValue(intV);
                    break;
                case "System.Decimal"://浮点型   
                case "System.Double":
                    double.TryParse(drValue, out double doubV);
                    mySheet.GetRow(RowIndex).GetCell(CowIndex).SetCellValue(doubV);
                    break;
                case "System.DBNull"://空值处理   
                    mySheet.GetRow(RowIndex).GetCell(CowIndex).SetCellValue("");
                    break;
                default:
                    mySheet.GetRow(RowIndex).GetCell(CowIndex).SetCellValue("");
                    break;
            }
        }
    }
}
